/* rain.c-- finds yearly totals, yearly average, and monthly
			   average for several years of rainfall data */
#include <stdio.h>
#define MONTHS 12	// number of months in a year
#define YEARS	5	// number of years of data
int main(void)
{
// initializing rainfall data for 2010 - 2014
	const float rain[YEARS][MONTHS] =
	{
		{ 4.3, 4.3, 4.3, 3.0, 2.0, 1.2, 0.2, 0.2, 0.4, 2.4, 3.5, 6.6 },
		{ 8.5, 8.2, 1.2, 1.6, 2.4, 0.0, 5.2, 0.9, 0.3, 0.9, 1.4, 7.3 },
		{ 9.1, 8.5, 6.7, 4.3, 2.1, 0.8, 0.2, 0.2, 1.1, 2.3, 6.1, 8.4 },
		{ 7.2, 9.9, 8.4, 3.3, 1.2, 0.8, 0.4, 0.0, 0.6, 1.7, 4.3, 6.2 },
		{ 7.6, 5.6, 3.8, 2.8, 3.8, 0.2, 0.0, 0.0, 0.0, 1.3, 2.6, 5.2 }
	};
	int year, month;
	float subtot, total;

	printf("  YEAR    RAINFALL  (inches)\n");
	for (year = 0, total = 0; year < YEARS; year++)
	{			  // for each year, sum rainfall for each month
		for (month = 0, subtot = 0; month < MONTHS; month++)
			subtot += rain[year][month];
		printf("%5d %15.1f\n", 2010 + year, subtot);
		total += subtot; // total for all years
	}
	printf("\nThe yearly average is %.1f inches.\n\n",
		total / YEARS);
	printf("MONTHLY AVERAGES:\n\n");
	printf(" Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct ");
	printf(" Nov  Dec\n");

	for (month = 0; month < MONTHS; month++)
	{			  // for each month, sum rainfall over years
		for (year = 0, subtot = 0; year < YEARS; year++)
			subtot += rain[year][month];
		printf("%4.1f ", subtot / YEARS);
	}
	printf("\n");

	return 0;
}